Messages in this thread Patch in this message | | | Subject | [PATCH v10 03/12] perf session: define bytes_transferred and bytes_compressed metrics | From | Alexey Budankov <> | Date | Mon, 18 Mar 2019 20:41:02 +0300 |
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Define bytes_transferred and bytes_compressed metrics to calculate ratio in the end of the data collection:
compression ratio = bytes_transferred / bytes_compressed
bytes_transferred accumulates the amount of bytes that was extracted from the mmaped kernel buffers for compression. bytes_compressed accumulates the amount of bytes that was received after applying compression.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> --- tools/perf/builtin-record.c | 14 +++++++++++++- tools/perf/util/env.h | 1 + tools/perf/util/session.h | 2 ++ 3 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index f55302dec440..51b7f23a0c7a 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1166,6 +1166,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) struct perf_session *session; bool disabled = false, draining = false; int fd; + float ratio = 0; atexit(record__sig_exit); signal(SIGCHLD, sig_handler); @@ -1463,6 +1464,11 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) record__mmap_read_all(rec, true); record__aio_mmap_read_sync(rec); + if (rec->session->bytes_transferred && rec->session->bytes_compressed) { + ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed; + session->header.env.comp_ratio = ratio + 0.5; + } + if (forks) { int exit_status; @@ -1509,9 +1515,15 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) else samples[0] = '\0'; - fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", + fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s", perf_data__size(data) / 1024.0 / 1024.0, data->path, postfix, samples); + if (ratio) { + fprintf(stderr, ", compressed (original %.3f MB, ratio is %.3f)", + rec->session->bytes_transferred / 1024.0 / 1024.0, + ratio); + } + fprintf(stderr, " ]\n"); } out_delete_session: diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h index d01b8355f4ca..fb39e9af128f 100644 --- a/tools/perf/util/env.h +++ b/tools/perf/util/env.h @@ -64,6 +64,7 @@ struct perf_env { struct memory_node *memory_nodes; unsigned long long memory_bsize; u64 clockid_res_ns; + u32 comp_ratio; }; extern struct perf_env perf_env; diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index d96eccd7d27f..0e14884f28b2 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -35,6 +35,8 @@ struct perf_session { struct ordered_events ordered_events; struct perf_data *data; struct perf_tool *tool; + u64 bytes_transferred; + u64 bytes_compressed; }; struct perf_tool; -- 2.20.1
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